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Sensors, Microphone / Sound Products Category on Adafruit Industries
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Amazon.com: Adafruit Electret Microphone Amplifier - MAX4466 with Adjustable Gain [ADA1063] : Electronics
Electret Microphone Amplifier - MAX4466 with Adjustable Gain : ID 1063 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits